What is the magnitude, in meters per squared second, of the car's average acceleration during the given time period. A car moves along a horizontal road with constant velocity v 0==v0,xi (47.1m/s)i until it encounters a smooth inclined hill. It climbs the hill with constant velocity v 1==v1,xi +v1,yj (45.2m/s)i +(1.13m/s)j as indicated in the figure. The period of time during which the car changes its velocity is t=1.29s